Magnetic resonance imaging evaluation of adjacent segments after disc arthroplasty

Neal, Chris J.; Rosner, Michael; Kuklo, Timothy R.

doi:10.3171/spi.2005.3.5.0342

Cited by 22 publications

(4 citation statements)

References 28 publications

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“…Recently, there have been several trials to assess ASD with MRI, and usability of MRI to assess ASD has been reported. Matumoto et al [27][28][29][30] reported 40-60 % degenerative change in adjacent disc after ACDF using MRI, and other study by CT also reported that asymptomatic ASD was detected as 50 %, and this result is very similar with our results. There has been no comparative study between ACDF and arthroplasty with MRI.…”

Section: Discussionsupporting

confidence: 92%

What are the associative factors of adjacent segment degeneration after anterior cervical spine surgery? Comparative study between anterior cervical fusion and arthroplasty with 5-year follow-up MRI and CT

et al. 2012

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Purpose It is well known that arthrodesis is associated with adjacent segment degeneration (ASD). However, previous studies were performed with simple radiography or CT. MRI is most sensitive in assessing the degenerative change of a disc, and this is the first study about ASD by radiography, CT and MRI. We sought to factors related to ASD at cervical spine by an MRI and CT, after anterior cervical spine surgery. Materials and methods This is a retrospective crosssectional study of cervical disc herniation. Patients of cervical disc herniation with only radiculopathy were treated with either arthroplasty (22 patients) or ACDF with cage alone (21 patients). These patients were required to undergo MRI, CT and radiography preoperatively, as well as radiography follow-up for 3 months and 1 year, and we conducted a cross-sectional study by MRI, CT and radiography including clinical evaluations 5 years after. Clinical outcomes were assessed using VAS and NDI. The fusion rate and ASD rate, and radiologic parameters (cervical lordosis, operated segmental height, C2-7 ROM, operated segmental ROM, upper segmental ROM and lower segmental ROM) were measured. Results The study groups were demographically similar, and substantial improvements in VAS (for arm) and NDI (for neck) scores were noted, and there were no significant differences between groups. Fusion rates were 95.2 % in the fusion group and 4.5 % in the arthroplasty group. ASD rates of the fusion and arthroplasty groups were 42.9 and 50 %, respectively. Among the radiologic parameters, operated segmental height and operated segmental ROM significantly decreased, while the upper segmental ROM significantly increased in the fusion group. In a comparative study between patients with ASD and without ASD, the clinical results were found to be similar, although preexisting ASD and other segment degeneration were significantly higher in the ASD group. C2-7 ROM was significantly decreased in ASD group, and other radiologic parameters have no significant differences between groups. Conclusion The ASD rate of 46.5 % after ACDF or arthroplasty, and arthroplasty did not significantly lower the rate of ASD. ASD occurred in patients who had preexisting ASD and in patients who also had other segment degeneration. ASD may be associated with a natural history of cervical spondylosis rather than arthrodesis.

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Section: Discussionsupporting

confidence: 92%

What are the associative factors of adjacent segment degeneration after anterior cervical spine surgery? Comparative study between anterior cervical fusion and arthroplasty with 5-year follow-up MRI and CT

et al. 2012

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“…Not discussed in the study by Neal et al, 23 we observed that the neuroforamina at the index site were obscured in the Co-Cr implanted patients. In the cervical spine, we found the ability to assess the adjacent levels was less than the lumbar spine when Co-Cr alloys are used.…”

Section: Discussioncontrasting

confidence: 45%

Magnetic Resonance Imaging Clarity of the Bryan®, Prodisc-C®, Prestige LP®, and PCM® Cervical Arthroplasty Devices

Sekhon¹,

Duggal

Lynch³

et al. 2007

Spine

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Preoperative and postoperative magnetic resonance imaging scans of 20 patients who had undergone cervical arthroplasty were assessed for imaging quality. Five cases each of the Bryan (Medtronic Sofamor Danek, Memphis, TN), Prodisc-C (Synthes Spine, Paoli, PA), Prestige LP (Medtronic Sofamor Danek), and PCM devices (Cervitech, Rockaway, NJ) were analyzed. Six blinded spinal surgeons scored twice sagittal and axial T2-weighted images using the Jarvik 4-point scale. Statistical analysis was performed comparing quality before surgery and after disc implantation at the operated and adjacent levels and between implant types. RESULTS.: Moderate intraobserver and interobserver reliability was noted. Preoperative images of patients in all implant groups had high-quality images at operative and adjacent levels. The Bryan and Prestige LP devices allowed satisfactory visualization of the canal, exit foramina, cord, and adjacent levels after arthroplasty. Visualization was significantly impaired in all PCM and Prodisc-C cases at the operated level in both the spinal canal and neural foramina. At the adjacent levels, image quality was statistically poorer in the PCM and Prodisc-C than those of Prestige LP or Bryan. CONCLUSIONS.: Postoperative visualization of neural structures and adjacent levels after cervical arthroplasty is variable among current available devices. Devices containing nontitanium metals (cobalt-chrome-molybdenum alloys in the PCM and Prodisc-C) prevent accurate postoperative assessment with magnetic resonance imaging at the surgical and adjacent levels. Titanium devices, with or without polyethylene (Bryan disc or Prestige LP), allow for satisfactory monitoring of the adjacent and operated levels. This information is crucial for any surgeon who wishes to assess adequacy of neural decompression and where monitoring of adjacent levels is desired.

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“…They were not blinded to post-treatment images when assessing pre-treatment images, and this may have influenced their pre-treatment ratings. Disc prostheses leave metal artefacts on the images close to the implant, but, according to previous reports [36][37][38], such metal artefacts barely affect the evaluation of the adjacent disc level, and the metal artefact reducing MRI protocol further reduced the extent of the artefacts (Figure 2). The artefacts might hide the caudal part of large Modic changes extending caudally from the upper adjacent level, but we could still assess change in the size of Modic changes in all patients in our study.…”

Section: Discussionmentioning

confidence: 74%

Adjacent Disc Degeneration After Lumbar Total Disc Replacement or Nonoperative Treatment

Furunes

Hellum

Espeland

et al. 2018

Spine

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Magnetic resonance imaging evaluation of adjacent segments after disc arthroplasty

Cited by 22 publications

References 28 publications

What are the associative factors of adjacent segment degeneration after anterior cervical spine surgery? Comparative study between anterior cervical fusion and arthroplasty with 5-year follow-up MRI and CT

What are the associative factors of adjacent segment degeneration after anterior cervical spine surgery? Comparative study between anterior cervical fusion and arthroplasty with 5-year follow-up MRI and CT

Magnetic Resonance Imaging Clarity of the Bryan®, Prodisc-C®, Prestige LP®, and PCM® Cervical Arthroplasty Devices

Adjacent Disc Degeneration After Lumbar Total Disc Replacement or Nonoperative Treatment

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